
There are many parks in Manhattan that aren't central park. The newest one is called High Line and took over rail track that was abandoned 30 years ago.

When I was living in Paris I enjoyed walking in a similar park (much longer than the High Line) between Bastille and gare de Lyon called
Le Viaduc Des Arts aka
La Coulée Verte [
map it] under the part they used the spaces for art galleries which is pretty cool too.

The design and plantings on the High Line are based on the naturally occurring plant life that sprung up when trains stopped running.
The High Line is located on Manhattan's West Side. It runs from Gansevoort Street in the Meatpacking District to 34th Street, between 10th & 11th Avenues. Section 1 of the High Line, which opened to the public on June 9, runs from Gansevoort Street to 20th Street.

As you can see it is quite a difference from the 'before'.

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The High Line